Thank you James!
I do the weathering on my models throughout the build and don't just save it all for the end, real machines don't have all the wear and tear done on them all at once and you can't expect a model weathered that way to look too convincing.
When I weather my plane models the weathering usually starts with a combination of panel line pre-shading and highlighting random panels, I did this with the two models in this thread but they are so small it can barely be seen in my pics.
After I paint the basic camouflage pattern on a model I will often spray a lighter version of the base colors in a very tight mottle in the high wear areas like the wing roots and raised areas of the model that catch a lot of light. Once the markings are put on I like to use highly thinned paints of the base colors and lightly spray over the model to tone the markings down and help them look like they were painted on, I try to go for a random patchy look and not make it an even coat.
After most of the airbrush painting is done the model will get a light coat of Future to seal in the decals and protect the light airbrush painting work, after the Future is dry I use highly thinned oil paints and odorless thinner to highlight the panel lines and other details.
When the work with the oil paints is finished I will spray on a coat of flat clear and add the last of the weathering effects including airbrushing exhaust stains and using silver paint and a silver artists pencil to finish up any paint chipping on the wing roots and around access panels.
Matrixone